POLYCOM -Polycom Certified Videoconferencing Engineer (PCVE) Set 1

Only one site of a conference is heard at any given time. ✘ Only one person at a time is heard speaking from any given room. ✘ Only one site of a conference is allowed to speak at any given time. ✘ Only one person at a time is allowed to speak in a given room attending a conference. ✔

The ability to determine frequency content of a signal. ✘ The ability of a device to respond to amplitude changes. ✘ The ability of a circuit to define operating frequency limits. ✘ The ability of a device to operate within defined frequency limits. ✔

Training occurs regardless of the events occurring in a given room. Training is independent of room audio components and gain settings. Training is the process by which an AEC adapts to the room acoustic system. Training can be accomplished through an explicit process such as white noise or pink noise.

audible sound quality measured audio signal level measured background noise level digital signal processor clock level

Wideband AECs treat the audio as one continuous segment. Sub-band AECs treat the audio as a single 3.1 kHz segment. Wideband AECs require additional processing to reduce echo artifacts. Sub-band AECs divide the audio into small segments and process each segment independently.

180 ✘ 193 ✘ 248 ✘ 251 ✔

to connect to a BRI ✘ to connect the D channel ✘ to connect to a 64 Kbps or lower circuit ✘ to connect one modem to another modem ✔

Protocol analyzer ✘ Distortion analyzer ✘ QPSK transmission analyzer ✘ Bit Error Rate Test (BERT) set ✔

File Transfer Protocol ✘ User Datagram Protocol ✘ Trivial File Transfer Protocol ✘ Address Resolution Protocol ✔ Simple Network Management Protocol ✔

It is used to identify the C.O. switch type. ✘ It is used to identify the proper D channel. ✘ It is used for identification when multiple devices are on one ISDN line. ✘ It is used for identification when multiple devices are on 2 ISDN lines. ✔